Патент USA US2412094код для вставки
Dec. 3, 1946. 2,412,094 J. .1. MOYNIHAN SIGNAL DEVICE 1 Filed April 1, 1942 IE. I a CI7 1+] 20 3o llb 40 E56. INVENTOR JOHN J. MOYNIHAN BY ' . M, 4WD & ATTORNEYS 2,412,094 Patented Dec. 3, 1946 UNITED STATES PATENT .IOFFI'CE ‘2,412,094 _ smmir. DEVICE John J. Moynihan, Rochester, N. Y., assignor of one-half to Joseph B. Brennan, Cleveland, Ohio Application April 1, 1942, Serial No. 437,252 7 Claims. (Cl. 177-351) ' i This invention relates, as indicated, to signal devices, and more particularly to a method of and apparatus for the transmission, to a remote point, certain signals and signal information so that the transmitted data may be in conveniently ob 2 usually quite fragile and is therefore entirely un- _ suited for most purposes for which equipment of this character is required. It is a principal object of my invention to pro vide a method of and apparatus'for producing ef fectively similar results with apparatus of a much servable and intelligible form. , ' less expensive and much more rugged nature. This invention relates particularly to methods Other objects of my invention will appear as of and apparatus of the character described in the description proceeds. which the remote station to which the informa To the accomplishment of the foregoing and tion is to be transmitted is most conveniently 10 related ends, said invention, then, consists of the coupled to the station of original information by means hereinafter fully described and particu means of a radio link. ' larly pointed out in the claims, the annexed ' My invention is particularly applicable for the drawing and the following description setting purpose of transmitting to a remote station an forth in detail certain means and one mode of indication of the present state of one or more 15 carrying out the invention, such disclosed means meters such as are usually provided with a cursor, and mode illustrating, however, but one of various the relative position of which is indicative of the ways in which the principle of the invention'may information to be derived from the particular in be used. ‘ ‘ strument or meter. From the description which In said annexed drawing: , ensues it will be readily apparent that my inven 20 Fig. 1 is a transverse sectional view of a cath-' tion is capable of a wide variety of application ode ray tube constructed in accordance with the such as, for example, when it is desired to deter principles of my invention and forming an ele mine at a remote point the present state of one ment of the apparatus of my invention; or more instruments, gauges, or similar indicating Fig. 2 is a sectional view of a portion of the devices. In one speci?c embodiment of my inven 25 structure illustrated in Fig. 1 drawn to an en tion the same may be utilized for the purpose of larged scale for clarity'of'illustration; determining at a remote point the present or in Fig. 3 is a transverse sectional view of the struc stant condition of a plurality of pressure gauges, ture illustrated in Fig. 1 taken on a plane sub temperature indicating devices, and the like, such as, for example, are providedwith cursors, the 30 stantially indicated by the line 3—_3; Fig. 4 is a schematic diagram illustrative of a position of which is indicative of the variable portion of the apparatus of my invention; Fig. 5 is a part sectional, part perspective view condition continuously re?ected by the speci?c instrument or gauge. Another field of utility of my invention is in de termining at a remote station such as may be con of an alternative form of construction of a part ' Fig. 6 is a diagrammatic representation of an alternative form of construction of a portion of my apparatus such as that illustrated in Fig. 1. 35 of the apparatus illustrated in Fig. 1; and veniently located on the ground, the condition of a plurality of instruments such as occur on the instrument panel of an airplane in ?ight. By the Broadly stated my invention comprises the pro use of my invention an operator at a ground sta tion may have before him a substantial duplicate 40 vision of means for generating a scanning elec tron beam, a target arranged to be traversed or or replica of the faces of the instruments, or at least certain of them, on the instrument panel of an airplane in flight with the cursors of the instruments thus located at the ground station at all times coinciding with their counterparts in the actual instruments on the plane itself. Heretofore it has been proposed to accomplish this result by utilizing television equipment for this purpose, and particularly by the employ ment of an ordinary image pick-up tube focused 50 on the instrument panel of the signal generating ' swept by said beam in its scansion, and means coordinated with the signal or data to be trans mitted for producing. a movable electron beam shadow on the target; deriving a signal which is a function of the impingement of the beam upon the target; and then transmitting such sig nal for reconstruction as a visual image at a re mote point whereby a facsimile or reproduction of the electron beam shadow on the target afore said will be reproduced. - In the foregoing broad statement of my inven tion, I have used certain terms, such as “scan equipment and a viewing tube at the remote sta tion on which the image of the pick-up tube is ning electron beam”; “target”; and “movable reconstructed. The optical and electrical appa ratus associated with such system is of course 55 electron beam shadow.” It may be well, before 2,412,094 3 proceeding with the description of my invention wherein these terms will be used repeatedly, to indicate the interpretation which I intend to be given to such terms whenever used in this descrip - tion or in the appended claims. By the term “a scanning electron beam," I in tend to generically include any electron beam or , the like which is caused to traverse in any way the target toward which it is directed. Where in 4 the special target which characterizes one fea ture of my invention. As previously indicated, the present invention is concerned with the problem of transmitting to a remote station data indicative of the position, for example, of a cursor associated with a con ventional instrument such as a pressure gauge, air speed indicator, altimeter, or the like. In Fig. 3, the base 4 of the tube envelope 3 is shown this description reference is made to the fact that 10 in dotted lines. In full lines is shown an instru ment panel on the face of which are mounted the beam scans the target, it is, therefore, meant the dials and movable cursors of the instruments that the beam sweeps over the target in whatever associated with the respective dials. Throughout direction or path may be desired for a particular .the following description of my invention, it will installation. Thus the beam, in sweeping over the target, may sweep thereover only once or a 16 be assumed that the apparatus illustrated, for example, is designed to transmit to a remote sta - plurality of times; and the line of intersection tion an indication of the relative positions of between the beam‘ and the plane of the target the several cursors with respect to their respective may be a straight line, a circle, or any modi?ca dials. tions of the same, it being within the contempla The instrument panel generally indicated at 5 tion of my invention to use any of these ex 20 has the several instruments 6 mounted thereon pedients. . with the shafts ‘I carrying the cursors extended Where the word “target” is used in this de so that when the panel 5 and envelope 3 are scription is meant the provision of any member mounted in assembled relation by clamps such whether conductive or non-conductive, but which is so positioned with respect to the electron beam 25 as 8, the cursors 9 will lie closely adjacent to the outer surface or face of the base 4 of the envelope. that the latter impinges thereon during atleast Rigidly supported 'in the base of the envelope, a portion of the period of oscillation of the beam. and preferably parallel to the base face 4, are Throughout the following description and in spaced plates l0 and II. These plates will be ‘the claims, I shall also frequently use the term “movable electron beam shadow,” and by this 30 anchored to the envelope in any suitable manner so as to be maintained rigid with respect thereto, term I, intend to generically include all cases and with respect to each other. The plate in is where the placing of any beam intercepting provided with bearings 12 which rotatablyisup means in the path of the beam prevents the latter port spindles 13. The spindles l3 have ?xed from impinging upon the target during any por tion of the path of travel of the beam. Thus, 35 thereto, at opposite ends, bars I4 and ii, the latter being made to correspond for convenience for example, if the beam is arranged to oscillate in shape and general configuration to a conven so as to closelyscan by following parallel lines tlonal cursor such as might be employed in con a rectangular area and a spherical object is junction with the instrument 8. placed in the path of the beam in front of the One of the elements 9 or H or both are per rectangular area or target, such object, in ac 40 manent bar magnets. The fact that the spindles cordance with my invention, would cast a circu I! are mounted for free rotation in the bearings lar beam shadow on the target even though such l2 will cause the bar H to, at all times, overlie spherical intercepting means only intercepts the the bar a in parallel relationship. , ’ beam periodically during the scansion of the lat Suitable leads such as it and I1 are connected 45 ter over the target. with the plates ill and II and carried through By use of the term "movable” in modifying the the envelope 3 in appropriate sealed connections. de?nition of “electron beam shadow" as above -In Fig. 4, I have illustrated diagrammatically de?ned, it is intended to mean that the electron the circuit previously explained. The electron beam intercepting means is movable in such a way that the total electron beam shadow cast 50 gun is‘ denoted by the reference character 2, and ' thereby is movable with respect to the target is capable of producing scanning electron beam upon which such electron beam shadow falls. Stated in another way, the provision of means for producing a movable electron beam shadow on the target comprises means for selectively 65 and the latter is shown connected directly to ‘ adapted to sweep over or scan the target plate I I. The bar I! is shown ?xed to the spindle l3 shielding diiferent portions of the target from impingement by said beam. the lead l8 instead of through the plate ill through which such connection is made in the actual construction illustrated in Figs. 1 and 2. Referring now more speci?cally to the drawing, and more especially to Fig. 1, the cathode ray be used in a television circuit and a conventional erally. indicated by the reference character I . In _ Fig. 1, that portion of the cathode ray tube 1 the spindle 1 of the instrument 6 rotates, the A conventional transformer l8, such as would tube here illustrated as embodying one represen 60 television transmitter, trated at l9. tation of the principles of my invention is gen- v is diagrammatically illus From the foregoing, it will be observed that as cursor l5 will be maintained in synchronism therewith. As the electron beam generated by 65 - erence character 2, is conventional, and forms no embraced by the bracket associated with the ref the gun I traverses or scans the target ii, the cursor i5 will intercept the electron beam or more accurately cast an electron beam shadow means for varying in a prescribed manner the on the target II, and the signal derived and axis of the ray with respect to the axis of the gun, so that such ray in its oscillation will sweep 70 transmitted to the remote station will, when. re part of this invention. The part 2 of the tube comprises the conventional cathode ray gun with constructed in accordance with conventional tele over or scan a target which may be positioned in vision practice, show the relative position of the the right-hand end of the tube. cursor IS with respect to the target. The envelope of the tube generally indicated Fig. 5 shows a slight modi?cation of the ar at 3 terminates in a substantially flat base 4 ad rangement illustrated in the previous figures, in 75 Jacent which is mounted in any suitable fashion 2,412,094 5 6 that the target I I a is provided with a plurality oir indicia which may be either apertures or and target, and an element between said beam generating means and said target movable by outside, control to form an image-shadow for non-conductive areas so that the facsimile of the target when reproduced at the receiving sta tion will have such indicia thereon to facilitate Cl interpetration of the position of the cursor with respect to such indicia as represented by the electron beam shadow oi’ the cursor on the reproduction. ‘ 3. In apparatus of the character described, the combination of means for generating a scanning electron beam, a target arranged to be swept by said beam, a sealed envelope enclosing said means target. ' and target, a cursor enclosed in said envelope In Fig. 6 I have illustrated a signal generat 10 between the beam-generating means and the ing cathode ray tube embodying a modification target for forming a reproducing image by cast of my invention as previously explained. In this ing a moving beam shadow on said target, and modification, a conventional cathode ray gun 2a means including a magnetic element for moving is employed. The base 4a of the envelope, or said cursor. more particularly the target lib, is curved so 15 4. In apparatus of the character described, the that a small sphere 2a (of suitable material as combination of means for generating a scanning known in the electronic art), when permitted to electron beam, a target arranged to be swept by restthereon by gravity, and when the axis 01' said beam, a sealed envelope enclosing. said the envelope 3a is tipped back and forth, the ,means and target, movable cursor means en sphere will roll back and forth on the target lib. 20 closed in said envelope between the beam In this case, the sphere 20 functions as the .generating means and the target for forming a cursor or as the means for providing the movable reproducing image b; casting a moving beam electron beam shadow on the target, and the, shadow on said target, and means deriving a signal derived from the target and transmitted signal from the target indicating the position will, therefore, show on the reproduction thereof 25 of the cursor means. at the remote station the relative position of the 5. In apparatus of the character described, the sphere 28 with respect to the target. It will be combination of means for generating a scanning immediately-apparent that the device in F13‘. 6 electron beam, a target arranged to be sweptby may be utilized as a turn and bank indicator, for said beam, a sealed envelope enclosing said aircraft. , The foregoing is obviously only one embodie ment of the principles of my invention, the illustrated embodiment being particularly suit 30 means and target, a cursor enclosed in said'en velope between the beam-generating means and the target for forming a reproducing image by. casting a beam shadow-on said target, means including a magnetic element for moving said able for use in connection with remotely con trolled aircraft where it is desired to indicate at 35 cursor, and means deriving a signal from the the ground station the condition of the instru target indicating the position of .‘the cursor ments in the remotely controlled craft. It will be apparent to those skilled in the art, however, that the fundamental expedient characterizing the present invention, namely the provision of means for casting a movable electron beam shadow on the target, may be utilized for a variety oi’ purposes which it is believed unneces sary to speci?cally refer to at this point. Other modes of applying the principle of my invention may be employed, change being made as 1 regards the details described, provided the features stated in any of the following claims or the equivalent of such be employed. 1, therefore, particularly point out and dis tinctly claim as my invention: 1. In apparatus of the character described, the combination of means for generating an electron beam, a target in the path of said beam, a sealed envelope enclosing said means and target, and movable cursor means between said beam-gen erating means and said target to form a shadow on the target for reproduction of such cursor means image. means. _ 6. In apparatus of the character described, the combination of means for generating a scanning electron beam, a target arranged to be swept by said beam, a sealed envelope enclosing said means and target, movable means enclosed by said envelope for forming a reproducing image of the ‘movable means by its casting a selectively movable beam shadow on said target, and a cursor outside of said envelope linked with said movable means whereby the position of the latter is synchronized with the position of said cursor. 7. In apparatus of the character described, 50 means for generating an electron beam,‘means for sweeping said beam back and forth in scan ning movement, a target to be scanned by said beam, a sealed envelope enclosing said means ‘and target, an indicating gauge on the outside of said envelope having a movable indicator ele ment, a cursor on the inside of said envelope‘ between the means for sweeping said electron ‘beam and said target and being movable-in unison with said gauge indicator element, and 2. In apparatus of the character described, the 60 means deriving a signal from said target having combination 01' means for generating a scanning electron beam, a target arranged to be swept by said beam, is sealed envelope enclosing said means a function indicative of the position of said ?rst named cursor. ' I ' _. . g ' ' JOHN J. MOYNIHAN. '